Ventilator



1932- J. R. TOWNSEND ,890,758

VENTILATOR Filed Dec. 11, 1930 lama 5". 1722711171 R Townsend,

Patented Dec. 13, 1932 PATENT OFFIC JOHN R. TOWNSEND, OF LAKE BLUFF, ILLINOIS VENTILATOR Application filed December 11, 1930. Serial No. 501,577.

This invention relates in general to a ventilator and has more particular reference to the kitchen or household type of ventilator in which it is desired to exhaust air, vapors and the like from the inside of the house and to admit fresh air from the, outside.

Among the objects of the invention are to produce a ventilating fan which is neat, compact, light and inexpensive and which may be readily set up or removed by an inexperienced person; to provide a ventilating fan in which the openings may be-opened or closed without operating the anotor and fan; to provide an improved mounting for a fan motor; to provide an improved simple control for the ventilator openings and for the fan control switch; to provide an improved outside vent for a ventilator of this kind;

H and in general to produce the construction herein shown and described.

In the drawing, Figure 1 is a sectional view of a ventilator constructed in accordance with the principles of this invention;

FigureQ is amend or front elevation of the ventilator; and

Figure 3 is a side view showing the venti lator openings and the means for closing them.

V The present invention relates particularly 3D to a hollowshell type of ventilator which .may be inserted in a circular chimney lthimble or other circular openings and of course it may be applied in anysuitable- .manner for discharging air, vapor and the like, from a room, and, if desired, to replenish a room with fresh air.

A further important part of the invention is in the provision of ventilator openings which are preferably controlled by pull strings and the arrangement of an electric switch for controlling the fan motor so that the movement of the ventilator member which controls the-openings also actuates the elec- 7 trio switch to start and stop the motor. v

Referring now more particularly to the drawing, this ventilator may be applied to any partition, wall or chimney designated generally as 4:, which has an opening 5 there in for communicatingeither with a vertical passage 6 or with a vent opening 7. The

site pull cords 29 and are attached. A

opening 5 is preferably circular with ametal thimble 8 therein but it should also be understood that the ventilator itself may be mounted in or upon a plate of any shape so that it can be inserted, for example, in .a '5 wlndow or other opening.

The ventilator mechanism comprises an outer shell 10 preferably circular in form and having a bead or ridge 11 adjacent the inner end for limiting the insertion of the shell in an opening. The-other endof the shell which normally projects within the room has a head 12 removably securedthereto by a numberof fastening devices 1.3. This head has-a central opening closed by a cap '14 with inner spring fingers 15 to hold it yieldingly in place. Projecting inwardly from the central opening of the head is a shell 16 with notches 17 at its inner or free end forming projecting tongues 18. Mounted within the shell 16 and resiliently engaged by the tongues 18 is an electric fan motor 19 which carries on its rotor shaft a bladed fan 20 of adiameter to rotate easily and freely within the outer shell 10. In order to hold the fan motor firmly in place, a pair of clamping members 21 are placed about the tongues 18 to compress the tongues against the outer surface of the fan motor by means of fastening or tightening members 22.

In the outer casing 10 are a number of spaced vent openings 25 and rotatably mounted within this shell is an inner shell 26 which has corresponding openings 27 so that by moving the two shells with respect to each other, the openings in them can be made to register or to close the openings in the shells. To rotate the inner shell, opposite slots 27 are provided in the outer shell and brackets 28 are secured to the inner shell having a projection or eyelet which extends through the slot 27 of the outer shell and to which oppodownward movement of one of the cords causes the openings in the shells to register and a movement of the opposite cord causes a corresponding closing of the openings through the shells. i

In order to actuate the motor and the fan,

an electric switch 30 having a movable tumbler 31 is secured to the inner side of the head 12 in such a position that the tumbler arm is engaged by either one of a pair of ears 32 or 33 bent inwardly from the inner shell 26 and located so that the inner shell may be moved to a position to almost close the open ings through the shell before the switch arm 31 is engaged to shut off the current for the motor. With this arrangement it is obvious that the motor may be energized and the openings may be varied as desired by means of the cords 29 and 30 without shutting off the current to the motor.

The cap 14 may be removed for oiling or adjusting the motor, the motor and fan may be removed with the head 12 by releasing the fastening means 13 and the motor clamp may be adjusted through the vent openings with out removing the motor from the shells. In the cap 14 are openings 24 for admitting cooling air to the adjacent end of the shell 16 which is drawn through the motor 19 by the fan 20 when it is in operation to assist in cooling the motor.

If an outer ventilator opening is desired a shell 35 may be inserted in the wall opening 7 which has a downwardly inclining portion 36 with a grating 37 therein having a number of horizontal louver blades 38 therein, disposed in an almost vertical position to keep out the weather, dirt, and other objectionable substances and to form drip surfaces which are nearly vertical. This construction does not substantially diminish the area of the ventilator discharge. For brick walls, the inner end 39 of the shell 35 may be turned outwardly to form a flange which engages in the mortar space behind one or more layers of brick.

With this construction it is apparent that a ventilator mounted in and controlled by the relatively movable shells may be applied to a ventilator opening or to a plate fitting such an opening and that the operation of the fan may be controlled automatically by the movement of the shells, and that the shells may be independently varied to adjust the ventilatmg openings.

While the preferred construction is thus described and shown, other changes may be made without departing from the spirit and scope of the invention.

I claim: i

1. In a ventilator, an outer shell and an inner shell having corresponding openings and movable relatively to open and close the openings, a motor mounted upon one of the shells and a fan carried by the motor within the shells, a switch for the motor carried by one of the shells and engaged for actuation by the relative movement of the other shell, to actuate the fan motor when the shells are relatively moved to register the openings and to stop the motor when the openings are closed.

movement, a head secured to the outer shell having a central projection, a motor carried l by said projection, a fan carried by the motor within the shells, and means for relatively moving the shells to open and close the openings when the motor is actuated and stopped.

3. In a ventilator, a pair of casings having registering openings therein and relatively movable for opening and closing the openings, a head for one end of the outer casing having a reduced shell projecting at the center of the casin a fan motor supported by the shell and a fan supported by the rotor of the motor and means for. actuating the motor and fan in accordance with the relative movement of the casings.

4. In a ventilator, an outer perforated shell open at one end and having a head at the other end with a central shell of reduced size provided with inwardly projecting tongues, a. fan motorand a fan carried thereby within the outer shell, the outside of the fan motor engaging the tongues of the inner shell, and means for tightening the tongues about the motor to hold it and the fan in place.

5. In a ventilator, an outer perforated casing open at one end, a removable head for the casing at the other having a central shell portion, a motor engaging the shell portion, a fan carried by the motor rotatable within the casing and a closing cap for the shell portion removable for access to the motor and having openings therein for supplying cooling a'r to the adjacent end of the motor.

6. In a ventilator, a pair of perforated casings movable with respect to each other to open and close the perforations, a head for one of the casings, an electric fan motor carried by the head within the casing, an electric switch for controlling the motor carried by the head and having a movable arm, projections on the other casing adapted to engagethe arm for opening and closing the switch to control the motor in accordance with the movement of the casings.

7 In a ventilator, a wall opening, a perforated shell insertable at one end into the wall opening and the perforated portion extending outwardly free from the wall, a head closure for the free end of the shell having a tubular extension into the shell, a fan motor engaged by the tubular extension, means for clamping the fan releasably in engagement with the tubular extension, a movable perforated shell fitting closely within the other shell but rotatable to cover and uncover the openings thereof, and means operated by the relative movement of the shells for stopping and starting the motor.

8. In a ventilator of the class described, a pair of perforated shells relatively movable one within the other to open and close the perforations therethrough, a fan motor disposed Within and supported by one of the shells, means controlled by the relative movement of the shells for actuating the fan and motor, the outer shell having opposite slots and the inner shell having projections extending through the slots, and pull cords attached to the projections for relatively moving the inner shell to open and close'the perforations.

9. In a ventilator, the combination with a Wall having an opening therethrough, a perforated ventilator shell inserted in the opening at one side of the wall, another perforated shell disposed Within the first named shell and rotatable to open and close the perforations therethrough, a fan motor mounted upon one of and Within the shells and means operated by the relative movement of the shells for correspondingly actuating the motor and one of the shells having a ventilator for the outside of the wall having a downwardly inclined outside portion With a Weather proof grating therein.

JOHN R. TOWNSEND. 

